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نتیجه جستجو - تاخیر

تعداد مقالات یافته شده: 115
ردیف عنوان نوع
1 Parallel Time-Delay Reservoir Computing With Quantum Dot Lasers
محاسبات مخزن تاخیر زمانی موازی با لیزرهای کوانتومی-2022
A semiconductor laser with optical feedback and optical injection is an appealing scheme to construct the time-delay reservoir computing (TDRC) networks. Quantum dot (QD) lasers are compatible to the silicon platform, and hence is helpful to develop fully on-chip TDRCs. This work theoretically demonstrates a parallel TDRC based on a Fabry-Perot QD laser with multiple longitudinal modes. These modes act as connected physical neurons, which process the input signal in parallel. The interaction strength of the modes is characterized by the cross-gain saturation effect. We show that the neuron interaction strength affects the performance of various benchmark tasks, including the memory capacity, time series prediction, nonlinear channel equalization, and spoken digit recognition. In comparison with the one-channel TDRC with the same number of nodes, the parallel TDRC runs faster and its performance is improved on multiple benchmark tasks.
Index Terms: Reservoir computing | quantum dot lasers | optical neural network | optical feedback | optical injection
مقاله انگلیسی
2 Performance evaluation of Focused Beam Routing for IoT applications in underwater environment
ارزیابی عملکرد مسیریابی پرتو متمرکز برای کاربردهای اینترنت اشیا در محیط زیر آب-2022
Underwater applications are becoming more and more interesting to industry and academy. They include data gathering for human safety and environment monitoring, control of underwater robots for various tasks and so on. Because of the accessibility limitations in underwater environment, applications tend to be automated and delay tolerant. In this paper, we consider IoT applications in underwater environment, while using Delay Tolerant Networking (DTN) carry–store–forwarding paradigm. DTN routing protocols are used to forward data from the monitoring mobile sensors to collecting devices at the water surface and vice-versa. One characteristic of routing protocols for DTN is flooding of messages to increase the delivery probability. For instance, Epidemic Routing (ER) protocol creates a copy of each message for each new node that does not already have the message in its memory. This increases the probability of delivery, but on the other hand, creates overhead in each node’s buffer, and uses a lot of valuable energy from the forwarding and receiving nodes. This work aims to analyze by simulations the performance of Focused Beam Routing (FBR) protocol for different FBR angles and different applications. We use Delivery Probability, Average Number of Hops, Overhead Ratio and Buffer Occupancy to simulate our scenarios by The ONE simulator. Simulation results show that for narrow angles of FBR the performance is better. In case of FBR-45, average hop count and overhead ratio are decreased by 10.9% and 16.6% respectively, compared to FBR-180. However, delivery probability decreases by only 3.9%.
Keywords: Underwater environment | Delay tolerant network | DTN | Focused Beam Routing | FBR the ONE simulator
مقاله انگلیسی
3 A solution for water management and leakage detection problems using IoTs based approach
راه حلی برای مشکلات مدیریت آب و تشخیص نشت با استفاده از رویکرد مبتنی بر اینترنت اشیا-2022
Water management, distribution, and consumption are not visualized in real time in conventional systems; this delays the leakage detection process. Nowadays, an increase in the development of smart water- meter trials and demand management requires higher spatial and temporal de- cisions. This paper proposes a solution for the water management and distribution problem. The solution is based on the IoT technology. First, a prototype abstracting the water distribution network (WDN) is developed. Second, sensors are installed on the network to capture the targeted physical quantities such as water pH level, turbidity, and flow rates. Third, sensor network is established to send the readings to Firebase platform. Fourth, an IoT testbed architecture is proposed to comprehensively interface all the IoT modules. Leakage detection scenarios are conducted to sense and warn admins and users to fix it. Application of the proposed system to smart homes would enable monitoring of water quality, measurement of consumption, and detection of leakage. Moreover, it provides an awareness highlight to users about consumption, and a monitoring platform for both users and admins for leakage detection.
keywords: اینترنت اشیا | مدیریت آب | تشخیص نشتی | IOT | Water management | Leakage detection
مقاله انگلیسی
4 Aggregate accounting research and development expenditures and the prediction of real gross domestic product
مجموع هزینه های تحقیق و توسعه حسابداری جمع آوری شده و پیش بینی تولید ناخالص داخلی واقعی-2021
The role of accounting information for public policy making has received increased attention in recent years. Konchitchki and Patatoukas (2014a,b) demonstrate that growth in aggregate accounting earnings can predict future growth in nominal and real Gross Domestic Product (GDP). We extend the micro to macro literature by decomposing earnings into the R&D and pre-R&D components. Using the Almon (1965) finite distributed lag model, we find that both components can predict future real GDP growth with different lead-lag structures. Importantly, this decomposition significantly increases the explanatory power of the predictive model using accounting information. Aggregate accounting R&D can predict real GDP through the personal consumption, business investment, and net export channels of GDP. Our study extends prior research on the forecasting usefulness of accounting information at the aggregate level and has practical implications for macro forecasting and for public policy making regarding innovative activities of publicly listed firms.
keywords: مجموع اعداد حسابداری | هزینه های تحقیق و توسعه | تولید ناخالص داخلی | پیش بینی کلان اقتصادی | ساختارهای تاخیری توزیع شده | Aggregate accounting numbers | Research and development expenditures | Gross domestic product | Macroeconomic forecasting | Distributed lag structures
مقاله انگلیسی
5 Dynamic simulation modelling of software requirements change management system
مدل سازی شبیه سازی پویا سیستم مدیریت تغییر نیازمندی های نرم افزاری-2021
Changes in the Software requirements, technological advances require flexibility in software system develop- ment. Unexpected changes and mistakes cause difficulties. They effectively manage destructive changes, rework, and errors; project managers need to consider dynamic behavior loops of feedback on lead delays and distur- bances. System Dynamics (SD) modeling methods have been used in the last few decades to meet this demand for analytical and project performance improvement. The SD model is used to improve the simulated change management policy for the Iranian project in the project’s planning and petrochemical industry. Dynamic simulations of the SD model. The results show that effective Knowledge Management (KM) is a crucial control factor for the project’s mechanically essential controls. Therefore, the proposal on the Knowledge Management aspect and attempts are to improve the manufacturing industry model. Effective formulation of dynamic simulation models project change management policy, time, consider Cost, quality, resources, and financial indicators. This model, such as financing, outsourcing activities, adjustment of the schedule, labor management, etc., to compare the alternative change management strategy in terms of the project’s performance indicators to enable the decision-makers.
keywords: مدیریت دانش | پویایی سیستم (SD) | هزینه | کیفیت | منابع | Knowledge management (km) | System dynamics (sd) | Cost | quality | resources
مقاله انگلیسی
6 The reduced auditory evoked potential component N1 after repeated stimulation: Refractoriness hypothesis vs: habituation account
کاهش مولفه بالقوه برانگیخته شنوایی N1 پس از تحریک مکرر: فرضیه نسوز در مقابل حساب عادت-2021
Similar to other event-related potential (ERP) components, the amplitude of the auditory evoked N1 depends on the interstimulus interval (ISI). At ISIs > 0.4 s, the amplitude of the N1 increases with longer ISIs, until it saturates at ISIs around 10 s. This amplitude increase with increasing ISI has been conceptualized as a function of N1 recovery or N1 refractoriness. Habituation (as a simple form of learning) represents an elaborated, opposing account for such stimulus repetition effects. For passive oddball experiments (stimulation protocols with frequent standards and rare deviants), the two accounts make different predictions. According to the habituation account, the presentation of small deviants should lead to an increased N1 for subsequent standards (= dishabituation); according to the N1 refractoriness account, there should be no or just minor effects on the N1. In the current study, we tested these predictions and compared the ERPs to standards after small deviants and to standards preceded by other standards. We observed that the ERPs to standards after small deviants were characterized by a small mismatch negativity with an onset latency > 150 ms, but the N1 to standards after deviants did not differ from the N1 to standards preceded by other standards. This negative finding is in line with other previous studies that were also not able to reveal evidence for N1 dishabituation. Aside from this repeated lack of evidence for dishabituation, the N1 habituation account is challenged by the finding that the N1 decrease is stronger for more intense stimuli. Overall, the current and previous findings are more compatible with the N1 refractoriness account, although the mechanisms underlying N1 refractoriness remain to be elucidated. Knowledge about these mechanisms would also help to understand why N1 deficits in schizophrenia are more pronounced at longer ISIs.
keywords: عادت | جهت دار | پتانسیل های ناشی از شنوایی | شدت محرک | نگرش ناسازگاری (MMN) | انطباق محرک-مشخصه (SSA) | Habituation | Dishabituation | Auditory evoked potentials | Stimulus intensity | Mismatch negativity (MMN) | Stimulus-specific adaptation (SSA)
مقاله انگلیسی
7 Soldiers dont go mad: Shell shock and accounting intransigence in the British Army 1914-18
سربازان دیوانه نمی شوند: شوک شلیک و ناسازگاری حسابداری در ارتش بریتانیا 18-1914-2021
This research examines intransigence in accounting systems. Using historical research methods and archival sources, it explores intransigence in the Royal Army Medical Corps’ accounting systems in the context of the incidence of shell shock among British Army soldiers fighting at the battlefront during the First World War. The Army did not recognise shell shock as a medical condition and made few changes to its medical accounting systems for soldiers with shell shock. The four factors of system stability of the AGIL scheme (adaptation, goal attainment, integration, latency) are used to understand the limited medical accounting response to shell shock. This research indicates that in addition to historical and internal political reasons for intransigence, intransigence will occur unless a factor in the AGIL scheme is sufficiently impaired to make the accounting system unstable and force system change. This research finding has contemporary relevance, explaining accounting intransigence in response to issues of social concern.
keywords: انطباق | رسیدن به هدف | نا سازگاری | تاخیر | حسابداری پزشکی | حسابداری نظامی | ادغام سیستم ها | Adaptation | AGIL | Goal attainment | Intransigence | Latency | Medical accounting | Military accounting | Systems integration
مقاله انگلیسی
8 تأثیر آموزش شناختی مبتنی بر واقعیت مجازی بر کودکان مبتلا به اختلال طیف اوتیسم
سال انتشار: 2021 - تعداد صفحات فایل pdf انگلیسی: 5 - تعداد صفحات فایل doc فارسی: 17
واقعیت مجازی (VR) یک محیط مصنوعی است که از طریق محرک های حسی که یک رایانه ایجاد می‌کند، تجربه می شود. قابلیت VR برای شبیه سازی واقعیت دسترسی به درمان های روانی را تا حد زیادی افزایش می‌دهد. برای تحلیل تأثیر آموزش ذهنی مبتنی بر VA روی کودکان مبتلا به اختلال طیف اوتیسم (ASD) مدل آموزش مداخله زود هنگام و بازخورد هوشمند جزئی ایجاد شد. برای کمک به شدت علائم و اثربخشی درمان آموزش ذهنی مبتنی بر VA در کودکان مبتلا به ASD ، از لیست بررسی رفتار اوتیسم (ABC) ، مقیاس درجه‌بندی اوتیسم دوران کودکی (CARS) و مقیاس رفتار اوتیسم Clancy (کابین) استفاده شد. نتایج نشان داد که آموزش ذهنی مبتنی بر VA برای کودکان مبتلا به ASD بسیار جذاب بود؛ آموزش ذهنی مبتنی بر VA علائم معمول (اختلال ارتباط اجتماعی ، تاخیر گفتاری، کم توجهی و رفتار جدی) کودکان مبتلا به ASD را به طور چشمگیری بهبود بخشید و طی 4 هفته پس از درمان لیست بررسی رفتار اوتیسم (ABC)، مقیاس درجه‌بندی اوتیسم دوران کودکی (CARS) و مقیاس رفتار اوتیسم را بهبود بخشید (کابین ها). داده ها حاکی از آن است که آموزش ذهنی مبتنی بر VA ممکن است روش خوبی برای درمان کودکان مبتلا به ASD باشد.
کلمات کلیدی : اختلال طیف اوتیسم | آموزش روانی کودکان | واقعیت مجازی | مداخله
مقاله ترجمه شده
9 Is justice delayed justice denied? An empirical approach
آیا عدالت با تاخیر عدالت انکار می شود؟ رویکرد تجربی-2020
Improving judicial performance in order to enhance the business environment has been a policy goal for many governments in the last decades. Following the suggestions of several international organizations, most countries have tried to speed up their case resolution systems by streamlining judicial procedure. However, not as much attention has been devoted to test the potential drawbacks of similar reforms in terms of supplying a quicker but yet qualitatively inferior justice, thus contradicting the well-known legal maxim justice delayed is justice denied. The present work wishes to contribute to the empirical literature on the topic by proposing two alternative ways to further disentangle the relationship between judicial performance and judicial quality. Exploiting a dataset of 171 countries for the 2003–2016 time period, we find statistically significant evidence of a strong and negative relationship between courts’ delay and countries’ quality of the justice. While the intrinsic limits of this kind of institutional empirical analysis suggest caution when interpreting our estimates as proof of causality, we present more robust evidence suggesting that countries characterized by faster judiciaries seem to be equally not affected by a deterioration of the quality of justice, thus confirming the aforementioned maxim, at least descriptively.
Keywords: Judicial delay | Judicial quality | Empirical institutional analysis
مقاله انگلیسی
10 التهاب کیسه صفرا حاد و سنگ مجرای اصلی صفراوی باقیمانده در بیماری معكوس بودن اندام ها ، روش لاپاروسکوپی موفق و ERCP (مورد مطالعاتی اکوادور)
سال انتشار: 2020 - تعداد صفحات فایل pdf انگلیسی: 5 - تعداد صفحات فایل doc فارسی: 11
معكوس بودن کامل اندام ها، وضعیت نادر ژنتیکی است که با انتقال اعضا به سمت معکوس بدن مشخص می شود ، در نتیجه ، سندرم های بالینی، تصویری بالینی غیرمعمول را نشان می دهند که یک چالش برای تیم جراحی است و زمینه ساز تاخیر در درمان و تشخیص است. برداشتن کیسه صفرا به روش لاپاراسکوپی، یک استاندارد طلایی برای التهاب کیسه صفرا حاد است و در بیماران مبتلا به سیتوس وارونگی ، روش لاپاروسکوپی باید متناسب با آناتومی بیمار اصلاح شود.
ارائه موردی: پرونده یک بیمار مرد 55 ساله بدون سابقه پزشکی قبلی ارائه شد ، این مرد با درد شکم در قسمت فوقانی سمت چپ خود به اورژانس مراجعه کرد. پس از یک معاینه دقیق ، التهاب کیسه صفرا حاد و معكوس بودن اندام ها تشخیص داده شد. وی بدون عارضه تحت عمل جراحی برداشتن کیسه صفرا به روش لاپاراسکوپی اصلاح شده قرار گرفت. در دوره بعد از عمل ، سنگ مجرای اصلی صفراوی باقی مانده شناسایی و ERCP انجام شد. در پیگیری ها ، بیمار وضعیت خوبی داشت.
نتیجه گیری: اگرچه برداشتن کیسه صفرا به روش لاپاراسکوپی و ERCP در بیمار مبتلا به معکوس بودن اندام نادر و از نظر فنی سخت است، اما امکان پذیر است. آناتومی تغییر یافته می تواند منجر به پیچیدگی شود ، بنابراین بنابراین برنامه ریزی مناسب و اجرای دقیق تکنیک های حین عمل ضروری است.
واژه های کلیدی: معکوس بودن اندام ها | کولسیستیت حاد | کوله سیستکتومی لاپاراسکوپی
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